Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Revenue from External Customer [Line Items]
Changes in contract estimates related to projects in progress			$ 5.6	$ 8.2
Transferred over Time | Product Concentration Risk | Revenue from Contract with Customer Benchmark
Revenue from External Customer [Line Items]
Concentration risk, percentage	94.00%	93.00%	94.00%	92.00%
Transferred at Point in Time | Product Concentration Risk | Revenue from Contract with Customer Benchmark
Revenue from External Customer [Line Items]
Concentration risk, percentage	6.00%	7.00%	6.00%	8.00%